last_ip_used does not sort correctly

[csiess]

Hi,

thanks a lot for this great script.
I had a small issue:

START_ALIAS_LINUX="10.2.237.1";
END_ALIAS_LINUX="10.2.237.49"

This stopped the script working beyond IP 10.2.237.10 because: last_ip_used outputs 10.2.237.9 where it should output 10.2.237.10:

docker inspect --format '{{ .HostConfig }}' $(docker ps -aq)| grep -o '[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+ 8000'|cut -d" " -f 1|sort -u|tail -1
10.2.237.9

docker inspect --format '{{ .HostConfig }}' $(docker ps -aq)| grep -o '[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+ 8000'|cut -d" " -f 1|sort -u
10.2.237.10
10.2.237.2
10.2.237.3
10.2.237.4
10.2.237.5
10.2.237.6
10.2.237.7
10.2.237.8
10.2.237.9

Adding the -n switch to the sort command fixes this:

docker inspect --format '{{ .HostConfig }}' $(docker ps -aq)| grep -o '[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+ 8000'|cut -d" " -f 1|sort -un|tail -1
10.2.237.10